// Copyright (c) 2024 - 2025 IBM Corp.
// All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package option

type (
	optionFunctor[A, B any] struct{}

	Functor[A, B any] interface {
		Map(func(A) B) func(A, bool) (B, bool)
	}
)

func (o optionFunctor[A, B]) Map(f func(A) B) Operator[A, B] {
	return Map(f)
}

// Functor implements the functoric operations for Option.
// A functor is a type that can be mapped over, transforming the contained value
// while preserving the structure.
//
// Example:
//
//	f := Functor[int, string]()
//	mapper := f.Map(strconv.Itoa)
//	result := mapper(Some(42)) // Some("42")
func MakeFunctor[A, B any]() Functor[A, B] {
	return optionFunctor[A, B]{}
}
